Nut-lock.



0. H. SLEEPER.

NUT LOCK. APPLICATION FILED SEPT-B11914- 1,156,105. Patented 001121915.

o'rIs H. SLEEPER, or EXETER, NEW HAMJPSHIRE.

NUT-LOCK.

Application filed September 8, 1914.

To all whom it may concern:

Be it known that I, OTIS H. SLEEPER, a citizen of the United States,residing at EXeter, in the county of Rockingham and State of NewHampshire, have invented new and useful Improvements in Nut-Locks, ofwhich the following is a specification, reference being made therein tothe accompanying drawing.

This invention relates to nut locks and particularly to a constructionwherein the nut and bolt may be locked together against relativemovement by a key carried in the nut itself.

It has been proposed heretofore to provide nuts with keys but these keyshave been either liable to accidental displacement and loss or otherwiseopen to objection in manufacture or operation.

The device of my present invention is characterized by the fact that thekey is longitudinally disposed within the nut and confined therein sothat it can not be lost when the nut is removed from the bolt and yetcan be permanently locked in place by a radial movement of the key.

The construction and operation of my invention will be more fullydisclosed in the specification that follows.

In the drawings forming a part of that specification I have shown as anillustrative embodiment a form of nut lock which has been foundsatisfactory in use and well adapted to the requirements of manufacture.

Throughout specification and drawings like reference numerals arecorrespondingly applied and in these drawings: Figure 1 is a plansection of a nut lock in accordance with my invention. Fig. 2 is a faceview of the rotatable socket piece or plug thereof. Fig. 3 is a detailwrench for rotating is a view partially lock assembled.

In carrying out my invention the nut or other part to be looked upon thebolt is provided with a radial opening in which a radially movablehollow socket piece or plug 1 is adjustably threaded. The plug 1 isprovided with a wrench socket preferably of square or polygonal form.The inner end of the plug 1 bears against the outer face of a radiallybut not longitudinally movable key or shoe 2 having threads on its innerface corresponding to the threads on the stem of said plug, and Fig. 4in section of the nut Specification of Letters Patent.

view of the actuating- Patented 0017. 12, 1915. Serial No. 860,688.

the bolt. The key 2 is of a dove tailed shaped in cross section and isradially movable in a dove tailed groove or slot 3 cut in the inner faceof the nut, the slot 3 being of slightly greater width than the key 2.The metal of the nut at each end of the slot is upset inwardly slightlyto provide stops for limiting the longitudinal movement of the key toprevent it from accidentally dropping out of the slot.

The key is moved radially but not longitudinally against the threads ofthe bolt to lock and unlock the nut and bolt by setting up or looseningthe plug 1 by the use of any suitable actuating member having an endwhich will fit in the exposed end of the plug 1. As a convenientform ofactuating member I have shown a wrench 4 having a laterally bent end tofit the wrench socket in the threaded plug 1.

In use, the actuating end of the wrench is inserted in the socket of thethreaded plug 1 and turned to partially rotate the plug. The screwing inof the plug forces in the key or shoe 2 radially and causes it to bindfirmly against the threads of the bolt. In unlocking the nut, the plugis screwed outwardlv to release the key from the bolt. The slight playof the key in its slot permits these radial movements. The stops at theends of the slot prevent accidental displacement of the key from thenut.

Various modifications in the form and construction of my device mayobviously be resorted to within the limits of the appended claims.

What I therefore claim and desire to se cure by Letters Patent is 1. Alook nut comprising an internally threaded nut having a dove tailedgroove across its inner face parallel to its axis, a dove tailed lockingpiece having threads corresponding to the threads of said nut and havinga slight radial play in said groove, means at the ends of said, groovefor confining said locking piece against longitudinal displacementtherein, and a radially adjustable tightening member having a bearing onsaid locking piece.

2. A look nut comprising an internally threaded vnut having a laterallyundercut groove across its inner face parallel to its axis, a laterallyextended locking piece having its portion exposed along the inneropening of said groove threaded in correspondtightening member having abearing on said locking piece.

In Witness whereof I aHiX my signature 1n the presence of two witnesses.

OTIS H; SLEEPER.

Witnesses EMMA C. SLEEPER, ALMON L. SLEEPER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

